Total bridges
99
Public highway bridges in Grant County
County profile · official public datasets
Grant County, NM
99 public highway bridges tracked in the FHWA National Bridge Inventory: 20.2% rated Good, 76.8% Fair, 3% Poor.
- 99
- Public bridges
- 20.2%
- Good condition
- 3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Grant County pairs a better-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- Top 44%
- lowest Poor share in state
- 3%
- Poor-condition share
- 99
- public highway bridges
- 1963
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Grant County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Grant County ranks #14 of 32 New Mexico counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3%). Grant County, New Mexico contains 99 public highway bridges. Roughly 20.2% are rated “Good,” 76.8% “Fair,” and 3% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
20.2%
20 of 99 rated 7-9
Fair condition
76.8%
76 of 99 rated 5-6
Poor condition
3%
3 of 99 rated 4 or below
In-state Poor-share rank
#14 of 32
Among New Mexico counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 99 NBI-tracked bridges by lowest applicable component rating.
Good 20.2% (20)
Fair 76.8% (76)
Poor 3% (3)
Grant County's Poor-condition bridges carry 14,136 vehicle crossings a day
That is 4.3% of the county's reported daily bridge traffic on 3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,712 crossings a day against 4,385 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 99 of 99 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
79.8% of Grant County's bridges have passed the 50-year mark
79 of the 99 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 20.2% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 97.5% of the county's Poor-condition bridge traffic
NM-90 over PINOS ALTOS CREEK, built 1961, carries 13,776 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 14,136 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Grant County's bridges were built
99 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1940s
1940–1949
23 bridges
- 1950s
1950–1959
21 bridges
- 1960s
1960–1969
26 bridges
- 1970s 8
1970–1979
8 bridges
- 1980s 10
1980–1989
10 bridges
- 1990s 1
1990–1999
1 bridges
- 2000s 1
2000–2009
1 bridges
- 2010s 4
2010–2019
4 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1960s, when 26 of the county's bridges still in the inventory were built, which is 26.3% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1963, 10 years older than the New Mexico average of 1973.
How Grant County compares with New Mexico's closest counties by inventory size
The 5 New Mexico counties nearest Grant County in number of bridges, with their condition splits. Its 3% Poor share is the 3rd-lowest of these 6. Its average build year of 1963 against a peer-group mean of 1969 is 6 years older.
Showing the 5 closest of 31 New Mexico counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Sierra County | 108 | 27.8% | 67.6% | 4.6% | 1971 |
| Luna County | 107 | 26.2% | 73.8% | 0% | 1961 |
| Catron County | 101 | 45.5% | 50.5% | 4% | 1962 |
| Grant County (this page) | 99 | 20.2% | 76.8% | 3% | 1963 |
| Taos County | 94 | 38.3% | 51.1% | 10.6% | 1971 |
| Eddy County | 93 | 41.9% | 58.1% | 0% | 1978 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Grant County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Grant County, both outside New Mexico so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NM (99 bridges here).
- Washington County, FL · 99 bridges
- Crisp County, GA · 99 bridges
- Harris County, GA · 99 bridges
- Newton County, GA · 99 bridges
Similar average build year
Nearest mean year-built outside NM (1963 here).
- Worcester County, MA · avg 1963 · 1,014 bridges
- Honolulu County, HI · avg 1963 · 682 bridges
- Chester County, PA · avg 1963 · 680 bridges
- Essex County, NJ · avg 1963 · 505 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (76)
17-3068
FairOver: GRIGGS CANYON
0.06 MI S OF JCT NM-35, Grant, NM
Built 1942 Load: 11.4 t ADT: 180
17-17033
FairOver: COLD SPRING CANYON
1.6 MI NE OF JCT NM-61, Grant, NM
Built 1908 Load: 14.5 t ADT: 180
NM-35
FairOver: WILLOW SPRING CANYON
5.1 MI N OF JCT NM-152, Grant, NM
Built 1941 Load: 14.7 t ADT: 1,101
17-B019
FairOver: UNNAMED WATERWAY
0.3 MI E OF JCT NM-61, Grant, NM
Built 1975 Load: 16.3 t ADT: 180
US-180
FairOver: BLACKSMITH CANYON
18.8 MI W OF JCT NM90, Grant, NM
Built 1966 Load: 17.0 t ADT: 1,306
NM-293
FairOver: UNNAMED WATERWAY
3.1 M. NORTH OF JUNCTION, Grant, NM
Built 1920 Load: 18.0 t ADT: 242
NM-35
FairOver: UNNAMED WATERWAY
8.6 MI N OF JCT NM-152, Grant, NM
Built 1970 Load: 19.6 t ADT: 1,101
NM-35
FairOver: UNNAMED WATERWAY
.4 MI N OF JCT NM152/NM35, Grant, NM
Built 1924 Load: 21.2 t ADT: 1,101
US-180
FairOver: GREENWOOD CANYON
21.4 MI NW OF JCT NM90, Grant, NM
Built 1966 Load: 23.4 t ADT: 1,306
NM-90
FairOver: UNNAMED WATERWAY
24.3 MI NE OF HIDALGO C.L, Grant, NM
Built 1941 Load: 24.3 t ADT: 2,488
NM-90
FairOver: UNNAMED WATERWAY
22.04 MI NE OF HIDALGO CL, Grant, NM
Built 1941 Load: 24.3 t ADT: 2,488
NM-90
FairOver: UNNAMED WATERWAY
24.8 MI NE OF HIDALGO C/L, Grant, NM
Built 1941 Load: 24.5 t ADT: 2,488
NM-211
FairOver: POPE CANYON
5.0 MI E OF CLIFF, Grant, NM
Built 1943 Load: 27.8 t ADT: 289
NM-15
FairOver: SAPILLO CREEK
0.5 MI S OF JCT NM-35, Grant, NM
Built 1963 Load: 28.2 t ADT: 227
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
0.8 MI W OF JCT NM-146, Grant, NM
Built 1957 Load: 29.4 t ADT: 14,649
US-180
FairOver: COTTON WOOD CANYON
16.3 MI NW OF JCT NM90, Grant, NM
Built 1966 Load: 31.5 t ADT: 1,306
US-180
FairOver: LOBO CANYON
28.3 MI W OF JCT NM90, Grant, NM
Built 1966 Load: 31.7 t ADT: 1,365
NM-15
FairOver: Gila River
12.5 M N Jct NM-35/NM-15, Grant, NM
Built 1963 Load: 32.4 t ADT: 213
NM-90
FairOver: UNNAMED WATERWAY
30.5 ME E OF JCT US-70, Grant, NM
Built 1941 Load: 32.7 t ADT: 2,488
NM-90
FairOver: WALNUT CREEK
12.7 MI NE OF HIDALGO C/L, Grant, NM
Built 1948 Load: 32.7 t ADT: 2,488
NM-90
FairOver: WALNUT CREEK S. BRANCH
12.1 MI NE OF HIDALGO C/L, Grant, NM
Built 1948 Load: 32.7 t ADT: 2,488
NM-90
FairOver: UNNAMED WATERWAY
11.9 MI NE OF HIDALGO C/L, Grant, NM
Built 1948 Load: 32.7 t ADT: 2,488
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
9.2 MI W OF JCT NM-146, Grant, NM
Built 1950 Load: 32.7 t ADT: 14,979
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
2.64 MI E OF JCT NM-146, Grant, NM
Built 1950 Load: 32.7 t ADT: 14,649
I-10 WBL/EBL
FairOver: UNNAMED WATERWAY
4.63 MI W OF JCT NM-146, Grant, NM
Built 1950 Load: 32.7 t ADT: 14,649
NM-152
FairOver: HANOVER CREEK
4.65 MI NE OF SANTA CLARA, Grant, NM
Built 1950 Load: 32.7 t ADT: 1,276
NM-61
FairOver: UNNAMED WATERWAY
11.8 M NE GRANT-LUNA C/L, Grant, NM
Built 1948 Load: 32.7 t ADT: 411
NM-293
FairOver: UNNAMED WATERWAY
1.8 MI NE OF CLIFF, Grant, NM
Built 1949 Load: 32.7 t ADT: 242
US-180
FairOver: PINOS ALTOS CREEK
8.9 M NW OF JCT NM-356, Grant, NM
Built 1948 Load: 32.7 t ADT: 21,061
NM-90
FairOver: GOLD GULCH
6.2 MI NE OF HIDALGO C/L, Grant, NM
Built 1952 Load: 32.7 t ADT: 2,488
NM-90
FairOver: WOOD CANYON
0.3 M NE HIDALGO/GRANT CL, Grant, NM
Built 1952 Load: 32.7 t ADT: 1,484
US-180
FairOver: LITTLE DRY CREEK
2.1 MI S OF CATRON C/L, Grant, NM
Built 1950 Load: 32.7 t ADT: 907
NM-153
FairOver: UNNAMED WATERWAY
3.5 MI N ON NM-153, Grant, NM
Built 1949 Load: 32.7 t ADT: 397
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
3.0 MI W OF JCT NM-146, Grant, NM
Built 1957 Load: 32.7 t ADT: 14,979
I-10 EBL/WBL
FairOver: LOCAL ROAD
7.4 MI W OF JCT NM-146, Grant, NM
Built 1957 Load: 32.7 t ADT: 14,782
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
0.62 MI W OF JCT NM-146, Grant, NM
Built 1958 Load: 32.7 t ADT: 14,649
I-10 EBL/WBL
FairOver: UNNAMED WATERWAY
2.22 MI W OF JCT NM-146, Grant, NM
Built 1958 Load: 32.7 t ADT: 14,649
NM-464
FairOver: UNNAMED WATERWAY
18.6 MI N OF JCT US-70, Grant, NM
Built 1958 Load: 32.7 t ADT: 28
NM-61
FairOver: UNNAMED WATERWAY
0.5 MI NE GRANT/LUNA CL, Grant, NM
Built 1959 Load: 32.7 t ADT: 411
NM-61
FairOver: UNNAMED WATERWAY
2.2M NE GRANT/LUNA C/L, Grant, NM
Built 1959 Load: 32.7 t ADT: 411
NM-61
FairOver: UNNAMED WATERWAY
14.52 MI NE OF JCT US-180, Grant, NM
Built 1959 Load: 32.7 t ADT: 411
NM-61
FairOver: COLD WATER CREEK
1.0 MI NE OF JCT US-180, Grant, NM
Built 1960 Load: 32.7 t ADT: 411
US-180
FairOver: RAPP CANYON
0.6 MI W OF JCT NM-356, Grant, NM
Built 1960 Load: 32.7 t ADT: 6,543
US-180
FairOver: WIND CANYON
3.6 MI W OF US-180/NM-90, Grant, NM
Built 1961 Load: 32.7 t ADT: 1,886
US-180
FairOver: FLEMING CANYON
13.3 MI NW OF JCT NM-90, Grant, NM
Built 1961 Load: 32.7 t ADT: 1,886
US-180
FairOver: SILVER CREEK
0.36 MI NW OF JCT NM-90, Grant, NM
Built 1963 Load: 32.7 t ADT: 2,888
US-180
FairOver: MISSISSIPPI STREET
0.7 MI W OF JCT NM-90, Grant, NM
Built 1963 Load: 32.7 t ADT: 2,888
US-180
FairOver: BUCK HORN CREEK
37.4 MI W OF JCT NM90, Grant, NM
Built 1963 Load: 32.7 t ADT: 1,105
US-180
FairOver: DUCK CREEK
4.36 MI S OF JCT NM78, Grant, NM
Built 1963 Load: 32.7 t ADT: 1,105
NM-15
FairOver: COPPERAS CANYON
1.7 MI N OF JCT NM-35, Grant, NM
Built 1963 Load: 32.7 t ADT: 213
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.